Hi some time i'm working on project and after play the preview some red line appear and block my character like a object wall so i cannot go in right direction. I lost many save because after appear this line never go off. So i ask what it's this bug and how to solve? Please see attachment
Did you check the game frame / borders ? I remember someone mentioned that he experienced a transit from pass-through to stop (red) when converting a bbdoc BB1 to BB2.